| Month | Temp. (min) | Temp. (max) | Temp. (avg) | Precipitation |
| January | 36°F | 58°F | 47°F | 3.4" |
| February | 37°F | 60°F | 48°F | 3.9" |
| March | 44°F | 67°F | 55°F | 3.5" |
| April | 53°F | 75°F | 64°F | 3.3" |
| May | 61°F | 81°F | 70°F | 4.6" |
| June | 70°F | 88°F | 78°F | 5.7" |
| July | 73°F | 90°F | 81°F | 7.0" |
| August | 72°F | 88°F | 79°F | 8.4" |
| September | 67°F | 84°F | 75°F | 9.2" |
| October | 56°F | 76°F | 65°F | 6.1" |
| November | 45°F | 67°F | 55°F | 4.2" |
| December | 41°F | 62°F | 50°F | 4.8" |
| Index | Castle Hayne | North Carolina | National |
| Air quality index | 34 | 35 | 42 |
| Pollution index | 4,252,890 | 2,789,538 | 2,726,193 |
| Measurement | Total |
| Days measured | 348 |
| Days with good air quality | 319 |
| Days with moderate air quality | 29 |
| Days w/ poor A.Q. for sensitive groups | 0 |
| Days with unhealthy air quality | 0 |
| Pollutant | Total |
| Arsenic | 0.010% |
| Benzene | 0.020% |
| Carbon Tetrachloride | 0.090% |
| Lead | 0.020% |
| Mercury | 0.004% |
| City | Population | Air Quality Index | National Avg. |
| Wrightsville Beach, NC | 2,541 | 34 | 32.0% |
| Atkinson, NC | 351 | 34 | 32.0% |
| Blue Clay Farms, NC | 52 | 34 | 32.0% |
| Leland, NC | 21,903 | 34 | 32.0% |
| Northwest, NC | 778 | 34 | 32.0% |
| Castle Hayne, NC | 993 | 34 | 32.0% |
| City | Population | Air Quality Index | National Avg. |
| Hughes, AR | 993 | 45 | 10.0% |
| Washington, KS | 993 | 32 | 36.0% |
| Rhodhiss, NC | 993 | 43 | 14.0% |
| Saddle Rock, NY | 993 | 51 | 2.0% |
| Cresson, TX | 993 | 33 | 34.0% |
| Castle Hayne, NC | 993 | 34 | 32.0% |
Here are the best places to live in North Carolina
See the best places to live in Castle Hayne
Most Dangerous States In The US
Check out the 10 most dangerous cities in North Carolina